S.Y.S.T.E.M. stands for, Sustaining Your Subconscious and Tapping Every Mind. In more English terms, the S.Y.S.T.E.M. is every mind in humanity merged together and stored in one server. Or, practically one server. The Overworld is the host server, but smaller servers branch out from that host server. They are more commonly known as dimensions, a place where you can be outside the confines of the host server while still having a small connection to it. Because of such dimensions, the S.Y.S.T.E.M. is a vast place with many places to visit. The most used dimension out of all of them is called Nocte, which is a metropolis that extends in a square of about a thousand miles width and height. It is the largest dimension to exist. I could keep going on and on, but I will stop here. I will cover the vastness of the S.Y.S.T.E.M. some other time. For now, I think this is enough.